package chapter03;

public class Circle {
    double r;
    public static final double PI = 3.14;

    public Circle(double r) {
        this.r = r;
    }

    public double area() {
        return (r * r * PI);
    }

    public static void main(String[] args) {
        Circle c1 = new Circle(2);
        Circle c2 = new Circle(3);

        System.out.println(c1.area() + "\t" + c2.area());
    }
}
